It appears that no protected health information was shared. The husband/father was the patient and thus there should not be an issue about the bill being sent to the husband. There is no "patient" in this type of case since this is an expert opinion that is being offered. There is more information that is needed in order to answer this question. It appears that there are some suspicions at issue here and perhaps some assumptions that are being made about phone call not being returned that would need to be addressed. But it is is not illegal to do so based on the facts given. If you need more help, please seek legal advice so the attorney can get the full facts. Good luck!